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Mmh M, 11947.
‘ c. R. BEEBE
2,41 ?,345
Filed Aug. 1, 1945
‘ CZ 400 F.
Patented Mar. 11, 1947
Claud R. Beebe, Inkster, Mich.
Application August 1, 1945, Serial No. 608,273
3 Claims. (01. 2166-41)
‘The present invention relates to improvements
culation of the water is accomplished by the;
in a cupola construction and more particularly to
thermo-siphon e?ect resulting from the method
improvements in a cupola construction adapted
by way of example to the melting of rock or slag
for the manufacture of mineral wool. The in
vention, however, is not limited in its use to this
particular ?eld, but may be used in any ?eld in
which high temperatures are to be developed in
a cupola to smelt, roast, sinter, re?ne‘ or melt
ores, ore bearing rock, glass, slag and the like.
In cupolas used in high temperature- furnace
smelting, sintering or re?ning operations, the
of feeding the water to the jacket and to the
tuyéres and of returning it to the supply tanks.
It is a further object of the present invention
to provide a cupola construction in which a heat’
exchanging air bustle is provided above the water
jacket of the cupola to provide for cooling the
upper portion of the cupola and preheating ‘the
air which is supplied to the tuyéres.
Other objects of this invetnion will appear in
the following description and appended claims;
reference being had to the accompanying draw;
charge offuel and material to be melted is‘
charged into the cupola and air under pressure is
ings forming a part of this speci?cationwherein
like reference characters designate corresponding
supplied at the zone of combustion through
tuyeres which extend through the cupola from
parts in the several views.
the air ,bustle pipe to the zone of combustion.
In the drawings:
, '
Prior to the present invention the life of con
Fig. 1 is a view showing the tuyere arrangement
ventional types of tuyéres in this type of service
and construction in top plan and showing a sec
was very limited because of the failure of the 20 tion of a cupola embodying the present invention,
materials from which the tuyéres were construct
the view being taken substantially 0n the line
ed when subjected to the high temperatures .in
l-l of Fig. 2 looking in'the direction of the
cident to their use.
1 It is an object of the present invention to pro
Fig. 2 is a fragmentary enlarged side elevation
vide‘ an improved cupola construction in which 25 partially, in section taken substantially on the
a novel form' of tuyére is provided to supply air
line 2-2 of Fig. 1 looking in the direction of the
to the zone of combustion in the cupola, the
arrows. and showing a cupola construction em
tuyéres'being characterized particularly in having
a relativelylong life'in service.
bodying the present invention and its associated
accessory units for supplying air to the bustle and:
-s It is‘fa further object-of the present invention 30 water to the cupola water jacket and to ' the‘
to'provide a novel cupola construction which is
tuyere jackets.
particularly adapted for use in high temperature
Before explaining in detail the present inven-"
operations, and in'which its novel construction
tion it is to be'understood that the invention is
not limited in the-application to the details of‘
gives it a long service life under difficult operating
‘ "
35 construction and arrangement -of - parts illus-_
It 'is another object of the present invention to
provide. a novel cupola construction in which the
refractory lining is uniformly cooled and air is
supplied to the zone of combustion through --a
plurality of jacketed tuyéres, each of [which is 40
cooleclby a ?uid coolant.
.- -,,It is a further object of the present invention
to provide'a'cup'ola construction in which a plu
trated in the accompanying- drawings, since the‘
invention isvcapable of other embodiments ‘and
of being practiced oricarried out in various ways.’
Also it is to be understood that the‘phraseology
or terminology employed herein is for the pur—
poseof description and not of limitation.
Referring to the drawings: '
A cupola embodying the present invention is
rality of vertically extending jacketed tuyéres are
indicated generally by the numeral l0- and com-'
employed to discharge a supply of'preheated air, 45 prises
a hood II leading to a stack (not shown)
into thecharge in. the cupola at the zone of com
and a combustion zone l2 provided'with a re-'"
loustion in‘the cupola,‘ thereby con?ning the zone
fractory lining [3 of any desired refractory mai'
of greatest temperature in the cupola to a limited
such for example as high temperature ?re‘
region adjacent the refractory lining thereof.
4 It is a further object of'the present invention 50 brick or the like. A water jacket 14 vsurrounds‘
the lower portion of the combustion zone I0 and
to provide a cupola construction in which the
water used in cooling the jacket surrounding the
refractory lining of the cupola. and in cooling
the'ituyeres .‘is supplied ..from a supply source
through supply .‘conduit' systems in‘ which the c'ir-éf
aids in dissipating heat from the refractory lining
l3. Water is supplied to the jacket I4 by the'
water supply pipe [5 leadi'ng'to ‘the supply tankf'
l6. Water is heated and rises in the water‘jacket'
i4 and is returned fromthe top of‘ the jacket “'1
the main steam line '33 to a blow cap, of conven~
through the water-return line l1 to the supply
tional construction and hence not shown, which
may be utilized in the event that the cupola con
struction of the present invention is used in the
manufactureof mineral wool. The water level in
the tank 21 is maintained by feed water supplied
from the feed water.‘ supply line 35. The level
of the water in the tank 2‘! may be regulated
manually by the operator or it may be controlled
tank l6. Steam and vapor is vented from the
supply tank It through a vent I8. The water
level in the tank 16 is maintained by water in
troduced through a water feed line 19. The sup
‘ I ‘ply of feed water may be maintained in the tank
16 by a. manual control (not shown) or it may be
i maintained by any suitable type of automatic
means such as a conventional ?oat control valve
or a metering r_la_lve,v_botl'iv of which constructions
are well known to those skilled in the art and
automatically through any :desired ‘conventional
type of float control valve or metering valve,
both of which are well known to those skilled in
hence are not here shown. The tank It is drained v
the art and hence not shown on the drawings.
through a suitable drain sillcock 9.
,Sediment in the tank 21 may be drained there
Immediately above the water jacket i4 is an‘
air bustle 20 which acts as a heat exchanging 15 from through a drain valve 35.
The arrangement of the tuyeres 24 and the
member between the top portion of the retrace "
,waterjackets 2e. ina circle spaced from the cen
tory lining l3 and the air supplied to the bustle
20 by an air supply duct 2! communicating with ‘ ter of the cupola is a particularly desirable ar
rangement for it permits ready charging of the
a power driven blower 22. The air is introduced
cupola from the top through the hood H and
from the duct 2| to the bottom of the bustle 23 20 provides a clear centerspace into which ‘the
and rises-while itis heetedin the bustle 219.
heated air 1 drawn .irorn the top of the bustle .20
through a plurality of air supply duets 2!, lead
ohereedstook will first ialliand thenflow toward
the circumference of the combustion zone i2./
The tuvere arrangement. alsoiserves to divide the
ing to the tops of a plurality of vertically ex
charge vertically ,and- to assist in supporting the. '
tending tuyéres 24, each having an .angularly 2.5 main
weight of theehargewhile ,nermittihgthe .
cut air ‘discharge end .25, terminating adjacent
charge to flow outwardly toward "the refractory
the combustion zone.,l.Z. .AS shown, the shortest
lining {3 in the plurality .of_.s.naoed.,pathsbetween
side of the angularly .cut discharge ends 25 .is
the tuyer'es.
located toward the center of the combustion
In protecting ‘the tuyerescae. from rapid-deteri
chamber I2. This assists. in directing the" air 3.0 oration.
dueto theheat. in the combustion zone,
inwardly of-iihe combustion chamber i2 and’ away
I vhave .iound it preferable .to use heated Water
from; the reiractory 13;. The tuyeres 2d are pro
as the. cooling medium forsuch water will absorb
tected againstrapid,deterioration due to the heat
a substantial amount of... heat in being converted
eerieretedwithin the. ouioola by a'water Jacket to
steam and wilLprei/ent the. thermal.‘shookv
surrounding the ibottomiiortion of each tuyére 24‘ 35 which
is noted when. cold waterisused and which
and extending over the portions thereof sub
is an added cause , for .the ‘rapid,deterioration-fot
jected to the highest temperatures during opera
the tuyeres. I havealso. observedthat in using
hot water asthe. heat absorbing ?uid, there is
less tendeneyior the. molten slag in the .oupola
to ball up. and. adhere .totthe-wallso ofgthetuyere
water j. cket. than .isjthe-oa‘se wherecoldwater
1219111.: of the oiipola. ‘Each ofT the water jackets
2.6. aroundthe- toyeree 2B is ‘supplied with water
from a. water supply tank 2] through a connec
tion 4.0 withe header til .trom which a water.
supply connection 28': leads to each. of said .water
jackets 26; The connections 28 lead from (the
is supplied to the tuyéres.
header Mia-rid enter the bottom of the water
jackets. 26 at anangle so as to discharge the water
upwardlyeioto-the water Jackets 26 and thus to
steam'aenerator. The water .is- supplied thereto‘
initiate the-upward how of water therethrough.
The bottom plate Mon each water iaoket is
‘welded to the body ‘thereof at an angle corre
spending to. theahgle of the Water ?ll-Dilly :oon
The tuyere water jackets; ‘it each aotae a
through the. linespzt underpressures siii?oiently
high to 'insureitsv?ow- against. suoh steam pres
sures asmay vlee-built‘up. inthehead of the water 7 ‘
jackets 26. It is preierahleto nseweter heated
nection 28 and assists in directing the water
the water jackets. 2.6- This also
eliminates. any; ‘pockets, in
steam might
etherwieeform the. bottoms; of the Water jackets
to its maximum temperature hero-rev changing
to steam- at the nressures employed in the water
tank and the water lines- This temperature is;
preferably in excess @1212"- VI?‘- ihiall. instances
Om ‘011.6% riqr?gqiillgtit' willzbe seen. that ‘the.
25.- >.A return line . isiedirom each water 55 cupola construction herein disclosed provides-an
e?lcient method for the heat; exchange- between
. re...-.ov.e.d>f;ro.m.the
top. there
Jacket; 2.16 .atepoiht
the refractorylinirig i3: i;n_:th.e:..combustion zone.
he. heated water to the header 62
12 and ‘the Water iaeket; M adjacent (thereto.
iléieerlsbaokto the tank
Thisp-rovides a un-iiorm cooling. of :the refractory‘
21 . .eanielerelopedin thewater-iaoketsz?ais col
lected: the; the head-crowded in. each-water 60 l3 adjacent the (zones. ‘of greatest temperature
jacket '15. ehoret. anoint oteonnection with the
return line 29. The ~.-_st_eam is led from the tops
of the weieriaolsets 52.6‘ through steam return '
therein. The provision oftthe-airibustle. :2i'lv also
provides, a heat exchange. between the top‘ por
tion ~ of :the. ‘ :rerraetory- ‘i3 vand‘. the .air 1 which. is
circulated through the ‘bustle 2a which is utilized
linestii extending from the head. portion of each
of the water ieohets 2.6 to. the. header. 44 from 65 tosupportthe combustion‘iin the combustion Jzone.
This. constructionuti-lizes the heat units other
which the return. l'ne t5 leads to the top; of the
wiselost by radiation-:to. heat the’ pro-‘heated air
tank 21.. The steam together with. the vapors
SUPRliQd-to theitliyélies; 2d‘.
girenrofiirom the-returned hot water in the tank
The use oi the preheated .air in. the tuyeres ‘24
?are accumulated in: the top portion of the
to provide a desirable-means i’or
tank and-are then taken off through a steam 70 hasbeenxfound
regulating the temperatures and ~.controlling the’
lineal connectedto a-watereeperetorez where
oondeheed wateris removed. from the-steam- The
steam isthen led into-a.
steam line 33; lead
ine- to- a. boiler (not shown) where. itemay be su
eeted.i.f..~ees.ire.d.-. ihg-steamline eilzleadstrom
the-roombustipn' zone . l2. since: it
grey-ides a‘, more eonstantvelocity to itheair and
theamount or ‘air sup‘
plieristot thehomhustionxthanisthewcaseewliere
2,417,845 "
air at atmospheric temperatures is supplied. Air ‘
at atmospheric temperatures varies'in velocity
and'hence' in amounts supplied as the atmospheric
temperatures vary.
The cupola construction of the present inven
tion is particularly economical in use. The steam
generated in thelwater jackets 26 surrounding
the tuyéres is carried away at relatively high
temperatures and is su?icient in temperature and
charge stock on the‘ bottom‘is melted “and ‘any »
waste or refuse, as for example molten iron which
may form in the melting of slag androck in
the.- manufacture‘ of mineral wool, can be re-,_
ilmoved from the cupola bottom by tapping the.
cupola without drawing-the ?re therefrom. Thus
the present invention permits the continuous op
eration of the cupola throughout prolonged pe
riods‘wihout requiring bottom changes.
in quantity to permit of its use for power in a 10 ‘T I claim:
. ~
plant in which the cupola construction is in
1. A cupola including arefractory lined com
In addition
cupola embodying the ' bustion chamber, a water jacket surrounding the
present invention has been found to have a long
lower portion of said chamber, an air, bustle
life in service as the refractory I3 is uniformly
surrounding the upper portion ‘of said com,- ,
cooled as herein disclosed and the tuyéres 24 are 15 bustion chamber, a plurality of vertically ex—
protected against deterioration by the highv heat
developed in the combustion chamber.
tending water jacketed tuyéres connected at
their upper ends with said air bustle and having
It will be noted also that the cupola construc
their lower ends open to discharge air into a
tion of the present invention is simple to con
zone of combustion in said combustion chamber, Y
struct and operate for it is not necessary to pro 20 an air- supply duct connected with the bottom _,
vide for water pumps to supply the water either
of said bustle and communicating with a source
to the water jacket M or to the tuyere water
of air under pressure an air supply duct leading
jackets 26. There is a positive circulation of the
from the top of said bustle to each of said plu
water through the water jackets I 4 and 26 by
rality of water jacketed tuyeres, and a water
its thermo-siphon action. In all instances where
circulating system for supplying water to said
steam is generated, it is led out of the system 25 water jacket around said combustion chamber,
so that there are no steam back pressures in the
and to the Water jackets surrounding said
water jackets which otherwise would prevent the
tuyeres, and including a water supply tank con
ready circulation of the water therethrough.
nected to the bottom portion of said water jacket
In operation it is to be noted that the spacing
surrounding said combustion chamber, and a
and placement of the tuyeres 213 permits a ready
second water supply tank having connections
top charging of the cupola which provides a uni
with the bottoms of each of the water jackets
form feeding of the charge stock through the
surrounding said tuyéres and extending upward
zone of combustion and hence this arrangement
at an angle to the bottoms thereof, and a water
simpli?es the charging of the cupola and its 35 ly
return line leading from each of the said tuyere
water jackets at a point removed from the top
t will be seen also that the cupola construc
thereof, and a steam line leading from each of
tion of the present invention, while novel in
the said tuyére water jackets at a point adjacent
many of its features and in its operation, is
the top thereof.
readily constructed of standard parts with a
2. A cupola including a refractory lined com
maximum utilization of the materials employed.
bustion chamber, a water jacket surrounding the
Two separate but interconnected water feeding
lower portion of said chamber, an air bustle
systems are shown. 0ne supplying the water
surrounding the upper portion of said combustion
jacket I 4 surrounding the lower portion of the re
chamber, a plurality of vertically extending
fractory i3 and the other supplying the water 45 water jacketed tuyeres connected at their upper '
jackets 26 of the tuyéres 25. The water in the
ends with said air bustle and having their lower
water jackets l 4 is under no steam pressure while
ends open to discharge air into a'zone of com
that in the tuyére water jackets is under steam
bustion in said combustion chamber, said tuyéres
pressures. Water is admitted to the tank H5 at
being symmetrically spaced circumferentially of
approximately atmospheric pressures and is heat 50 said cupola to provide an open centrally located
ed by its passage through the water jacket I4
space for charging said cupola from the top por-v
after which it is pumped out of the line 8 to the
tion thereof, an air supply communicating with
feed water line 35 of the tank 21. Thus the water
said bustle to supply air thereto and to said
jacket I4 serves to heat the feed water for the
tuyeres and a water circulating system for sup
tank 21, This constant circulation of the Water 55 plying water to said water jacket around said
through the jacket I 4 prevents the water from
combustion chamber and to the water jackets
boiling in the jacket M and the generation of
surrounding said tuyeres, and including a water
steam therein.
supply tank connected to the bottom portion of
In using conventional types of tuyeres in cupola
said water jacket surrounding said combustion
operations, it is necessary to shut down the oper 60 chamber and a second water supply tank having
ations periodically to clear the bottom of accumu
connections with the bottoms of each of the
lated waste and unburned materials. If this is
water jackets surrounding said tuyeres and ex
not done, the ?re placement in the cupola is
tending upwardly at an angle thereto and a water
changed, due to the build-up of such materials
return line leading from each of the said tuyere
on the bottom and the operation of the cupola 65 water jackets at points removed from the top
is impaired. As contrasted with such conven
thereof, and a steam line leading from each of
tional constructions, a cupola embodying the
said tuyére water jackets at a point adjacent
present invention may be operated for very long
the top thereof.
periods of time without requiring shut downs and
3. A cupola including a refractory lined com
rebuilding of the bottom. This is due to the 70 bustion chamber, a water jacket surrounding the
downwardly directed blasts of air from the
lower portion of said chamber, an air bustle sur
tuyeres 25, which assures a distribution of air
rounding the upper portion of said combustion
through the materials on the bottom so that full
chamber, a plurality of vertically extending water
combustion is assured. This provides su?icient
jacketed tuyeres connected at their upper ends
heat at the bottom 01’ the cupola so that the 76 with said air bustle and having their lower ends
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